Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b66795fd0a0770d…

MALICIOUS

PDF

43.5 KB Created: 2021-05-10 13:33:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ca626b7ccd44faa4af84fa2f1ae8b9dc SHA-1: 2568d0c8c83b50aa42afd5897f0c8faea6bddb32 SHA-256: 7b66795fd0a0770d879f60c32671d2e43d997e3bcf72e5a55a4567fe9e849598
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and websites offering 'free generators' or 'hacks' for popular games, indicating a phishing or scam attempt. The embedded URLs are designed to lure users into clicking them, likely leading to further malicious content or potentially unwanted applications. No scripts were extracted from this sample, but the presence of malicious links and the ML classifier's high confidence score strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/431946152/robux-online-game-hack In PDF document text
    • http://lib.mappifhui.org/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d13.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D13 25568 bytes
SHA-256: 4d7dccb46afe507196700bef13987d46778a95c5c14a8c0d6e7c45f4505f3530
font_01_sfnt_off0000889e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x889E 18044 bytes
SHA-256: 613688d39500d5b16bf64409f0aca6fe840d07506161475672c290022fb5aac0

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